CN113895889A

CN113895889A - Large-tonnage object horizontal pushing track structure

Info

Publication number: CN113895889A
Application number: CN202111265149.9A
Authority: CN
Inventors: 唐洪志; 易高文; 舒昭溢; 李文强
Original assignee: China 19th Metallurgical Group Co ltd
Current assignee: China 19th Metallurgical Group Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-01-07

Abstract

The invention discloses a large-tonnage object horizontal pushing track structure, relates to the technical field of metallurgical engineering construction, and aims to enable a track to provide pushing reaction force for a hydraulic device at each position. The technical scheme adopted by the invention is as follows: track structure is passed to large-tonnage object level, including the basis and set up in at least two sets of channels of advancing of basic upper surface, the basis is reinforced concrete structure, and each group's passageway of advancing is parallel to each other, and the structure of advancing the passageway is: the top of basis sets up the recess, and the both sides of recess are fixed respectively and are set up two tracks, and two orbital installation face levels, two tracks are parallel to each other and about the central line axial symmetry of recess, and the bottom interval arrangement of recess is ratchet dentate thrust groove at vertical cross-section, and the thrust groove is used for providing the reaction force that pushes away for hydraulic means. The track directly bears smooth vertical load, provides the passageway that slides simultaneously, and the track homoenergetic provides the reaction force that pushes away for hydraulic means in different positions, realizes that long distance pushes away.

Description

Large-tonnage object horizontal pushing track structure

Technical Field

The invention relates to the technical field of metallurgical engineering construction, in particular to a rail structure for horizontally pushing a large-tonnage object such as a blast furnace.

Background

The overhaul capacity expansion of the blast furnace equipment comprises the steps of dismantling the old blast furnace and installing a new blast furnace shell. The method for integrally pushing the blast furnace shell can greatly shorten the construction period, but the dead weight of the blast furnace is thousands of tons, the integrally pushed distance is often tens of meters, and the construction difficulty of integrally pushing the blast furnace is very high.

The whole blast furnace is pushed and pushed by using a hydraulic device, and the hydraulic device needs a supporting seat to provide a reaction force. In a conventional manner, the support base is fixedly mounted somewhere and provides a reaction force to the hydraulic device. For example, the patent of invention with the publication number of CN 209555272U discloses a movable propelling device for off-line synchronous pushing of a blast furnace, which comprises a balance base, a propelling beam, a hydraulic cylinder and a counter-force supporting beam unit, wherein a guide rail is fixedly arranged on the balance base, and the guide rail is provided with the blast furnace and the propelling beam for providing horizontal sliding power for the blast furnace in a sliding manner; the counter-force supporting unit comprises a supporting beam and a counter-force supporting seat, the supporting beam is slidably mounted on the guide rail, the extending direction of the supporting beam is perpendicular to the guide rail, a hydraulic cylinder is fixedly mounted on one side of the supporting beam, the counter-force supporting seat is fixedly mounted on the other side of the supporting beam, and the counter-force supporting seat is connected with the guide rail through a fixing pin. The transmission path of the reaction force generated by pushing of the hydraulic cylinder is as follows: the support beam → the reaction force support seat → the fixed pin → the guide rail → the balance base, because the reaction force support seat is connected with the guide rail through the fixed pin, when the reaction force generated by the pushing is too large, the fixed pin is easy to be damaged, leading to the failure of the pushing.

Disclosure of Invention

The invention provides a horizontal pushing track structure for a large-tonnage object, and aims to enable a track to provide pushing reaction force for a hydraulic device at each position.

The technical scheme adopted by the invention for realizing the aim is as follows: track structure is passed to large-tonnage object level, including the basis and set up in at least two sets of channels of advancing of basic upper surface, the basis is reinforced concrete structure, and each group's passageway of advancing is parallel to each other, and the structure of advancing the passageway is: the top of basis sets up the recess, and the both sides of recess are fixed respectively and are set up two tracks, and two orbital installation face levels, two tracks are parallel to each other and about the central line axis symmetry of recess, and the bottom interval arrangement of recess is ratchet-toothed thrust groove in vertical cross-section.

Further, the method comprises the following steps: the bottom of recess is equidistant pre-buried counter plate and hang plate, and the incline direction of counter plate and hang plate is opposite, and the acute angle of the formation of counter plate and horizontal plane is greater than the acute angle that hang plate and horizontal plane formed, and counter plate and hang plate form the thrust groove.

Further, the method comprises the following steps: the reverse push plate and the inclined plate are steel plates, an auxiliary supporting steel plate is further arranged on one side of the reverse push plate, back to the inclined plate, and the auxiliary supporting steel plate is horizontally arranged and perpendicular to the reverse push plate or between the auxiliary supporting steel plate and the reverse push plate from perpendicular to horizontal.

Further, the method comprises the following steps: one end of the groove is a pushing starting end, and the foundation is fixedly provided with a fixed seat at the pushing starting end of the groove.

Further, the method comprises the following steps: the angle steel is pre-buried in the foundation of recess both sides respectively, and the angle steel of recess both sides is arranged according to "+" type, and the vertical face of angle steel forms the lateral wall of recess, and the track is fixed in the top of the horizontal plane of angle steel or the top of the horizontal plane of angle steel sets up the screed-coat, and the track is placed in the screed-coat.

Specifically, the method comprises the following steps: the pushing channels are four groups, and the distance between any two adjacent pushing channels is equal.

Specifically, the method comprises the following steps: the track is a QU120 heavy steel rail, the top surface of the track is planed by 5mm and ground to the smoothness of not less than 3.2, and the smoothness of the outer side surfaces of the upper flanges of the two steel rails of the pushing channel is not less than 12.5; the levelness of the upper surface of the track is less than L/1000, L is the length of the track, and the allowable deviation of the height difference at the joint of the track sections is less than 1 mm.

Further, the method comprises the following steps: the track is fixed in the basis through the polylith clamp plate that the interval set up.

Specifically, the method comprises the following steps: connecting pieces are embedded in the foundations on the two sides of the groove in an embedded mode, and the pressing plates are fixed to the connecting pieces through bolts.

Further, the method comprises the following steps: the upper part of the connecting piece is provided with a steel base plate, the track is placed on the steel base plate, and the space below the top surface of the steel base plate is filled with grouting material.

The invention has the beneficial effects that: the track directly bears the vertical load of the object that slides, provides the passageway along the direction of sliding simultaneously, sets up the recess between two tracks of same group's lapse passageway, and the bottom interval arrangement thrust groove of recess, thrust groove provide the reaction force that pushes away for hydraulic means. The thrust groove is arranged along the bottom of the groove at intervals, the track can provide the counterforce for pushing for the hydraulic device at different positions, and long-distance stable pushing can be realized on the premise of not prolonging the stroke of the hydraulic device.

The bottom of the groove is embedded with the counter-push plate and the inclined plate at equal intervals, and the reaction force pushed by the hydraulic device directly acts on the counter-push plate, so that stress dispersion is facilitated, and damage caused by overlarge stress of the thrust groove is avoided. The foundation is provided with a fixed seat at the pushing starting end, and can provide reaction force for the initial pushing of the hydraulic device. The angle steel is embedded in the foundations on the two sides of the groove respectively, and the effect strength of the groove is improved.

Drawings

FIG. 1 is a schematic perspective view of a horizontal pushing track structure for large tonnage objects of the present invention.

Fig. 2 is a side view of the embodiment shown in fig. 1.

Fig. 3 is a plan view of the embodiment shown in fig. 1.

Fig. 4 is a schematic cross-sectional view of the embodiment of fig. 1 in a vertical plane perpendicular to the rail.

FIG. 5 is a schematic diagram of the embodiment of FIG. 1 in cooperation with a thrust reverser.

Reference numerals: the device comprises a foundation 1, a groove 2, a track 3, a thrust groove 4, a counter-thrust plate 41, an inclined plate 42, an auxiliary supporting steel plate 43, a fixed seat 5, angle steel 6 and a leveling layer 7; a reverse push rod 81, a reverse push seat 82, a hydraulic cylinder 83 and an object to be pushed 9.

Detailed Description

The invention will be further explained with reference to the drawings.

A large-tonnage object horizontal pushing track structure is used for horizontally pushing a large-tonnage object along a fixed pushing channel through a hydraulic device. The mass of a large tonnage object is on the order of tens of millions of tons, such as a blast furnace. FIG. 1 shows an embodiment of a track structure for moving a blast furnace with a base in a whole, wherein the blast furnace is 2500m³Diameter of 14.90m, height of 38.88m, horizontal sliding distance of 45m, and base and refractory materialThe overall pushing weight of the furnace pipelines, the equipment and the like is about 7200 tons.

As shown in FIGS. 1-3, the horizontal pushing track structure for large tonnage objects of the present invention comprises a foundation 1 and at least two sets of pushing channels disposed on the upper surface of the foundation 1. The foundation 1 is a reinforced concrete structure, and because the construction is carried out in a factory, the foundation 1 preferably adopts a pile foundation, and the pile foundation adopts a cast-in-situ bored pile. The number of groups of pushing channels is determined comprehensively according to the mass and the size of the object 9 to be pushed, the parameters of the hydraulic device and the like. At least two groups of pushing channels are parallel to each other to ensure the balance of the pushing process, for example, as shown in fig. 1 to 3, four groups of pushing channels are provided. When the pushing passages are three groups or more, two adjacent pushing passages can be arranged at unequal intervals, but preferably at equal intervals, and the pushing passages are parallel to each other and positioned on the same horizontal plane. The distance and the position of each group of pushing channels are determined according to the size, the initial position and the target position of the large-tonnage object. The pushing channels of each group have the same structure to realize synchronous pushing, and the pushing channels of a single group are explained in detail below.

Referring to fig. 4 and 5, the push passage has a structure of: the top of basis 1 sets up recess 2, and the both sides of recess 2 are fixed respectively and are set up two tracks 3, and two tracks 3 are located the top of basis 1, and the interval between two tracks 3 is the same with the width of recess 2 best. The mounting surfaces of the two rails 3 are horizontal, so that the upper surfaces of the rails 3 are also horizontal, and the two rails 3 are parallel to each other and are axisymmetric with respect to the center line of the groove 2. The rail 3 is used for bearing upper load and providing a determined passage for horizontal displacement of large-tonnage objects.

The load borne by the rail 3 is directly transferred to the groove 2 at the top of the foundation 1. In order to improve the structural strength of the reinforced concrete at the groove 2, angle steels 6 are respectively embedded in the foundation 1 at both sides of the groove 2, the angle steels 6 at both sides of the groove 2 are arranged in a gamma type, the vertical surfaces of the angle steels 6 form the side walls of the groove 2, a leveling layer 7 is arranged on the horizontal surface of the rail 3 directly fixed to the angle steels 6 or the horizontal surface of the angle steels 6, and the rail 3 is placed on the leveling layer 7 and fixed to the foundation 1, as shown in fig. 4. The inside of the angle steel 6 is provided with a reinforcing bar which is fixedly connected with the structural steel bar of the foundation 1. The horizontal plane of the angle steel 6 has a width larger than the bottom width of the track 3, for example, the horizontal plane and the vertical plane of the angle steel 6 both have a width of 200mm and a thickness of 20 mm.

The rail 3 is preferably a steel rail, for example QU120 heavy rail. In order to effectively control the sliding resistance, the top surface of the steel rail is planed and ground, for example, planed to 5mm in thickness and ground to a finish not lower than 3.2; the outer side of the upper flange of the two rails of the same set of pusher shoes is preferably ground flat, for example to a surface finish of not less than 12.5, to avoid premature wear of the guide surfaces of the guide shoes. The bottom surface of the object to be pushed 9 in a large tonnage is provided with a guide sliding shoe, and the guide sliding shoe is directly placed on the track 3. The levelness of the upper surface of the single steel rail is less than L/1000, and L is the length of the single track 3. The allowable deviation of the height difference at the joint of the steel rail sections is less than 1 mm. The levelness of the top surface of the steel rail is controlled within 0.10mm/m, and the height difference within the full-length range is controlled within +/-5 mm.

The upper surface of the foundation 1 is cleaned, leveled and scribed before the track 3 is installed, so that the contact surface of the foundation 1 and the track 3 is tightly and horizontally attached, and if a gap or non-level exists in the local part, a steel plate can be used for padding and grouting by grouting material. The rail 3 is fixed to the foundation 1 to ensure the stability of the rail 3. For example, the rail 3 is fixed to the foundation 1 by a plurality of pressing plates arranged at intervals, and the shape of the pressing plates is matched with the shape of the rail 3. Specifically, embedded connecting pieces are arranged in the foundation 1 on two sides of the groove 2, and the pressing plates are fixed on the connecting pieces through bolts. In order to ensure that the connecting piece is firmly fixed in the foundation 1, the upper part of the connecting piece is provided with a steel base plate, the rail 3 is placed on the steel base plate, the space below the top surface of the steel base plate is filled with grouting material, and the steel base plate also has the function of supporting the rail 3.

The bottom of the groove 2 on the upper surface of the foundation 1 is arranged at intervals in a thrust groove 4 with a ratchet-shaped vertical section, and the thrust groove 4 is used for providing pushing reaction force for a hydraulic device and is therefore ratchet-shaped. Referring to fig. 5, the hydraulic device includes a reverse pushing rod 81, a reverse pushing base 82 and a hydraulic cylinder 83, one end of the reverse pushing rod 81 is rotatably connected to one side of the reverse pushing base 82, the reverse pushing rod 81 is horizontal to the rotating shaft of the reverse pushing base 82 and vertical to the rail 3, the other end of the reverse pushing rod 81 falls into the thrust groove 12, and the thrust groove 12 provides a reaction force for the reverse pushing rod 81. For example, the reverse pushing seat 82 is provided with two connecting plates arranged vertically, a reverse pushing rod 81 is placed between the two connecting plates, and the two connecting plates are connected with the reverse pushing rod 81 through a pin shaft. The bottom of the reverse pushing seat 82 is a sliding plate, the bottom surface of the sliding plate is provided with a sliding chute matched with the two rails 3 of the same group of pushing channels, and the sliding chute is clamped on the two rails 3, so that the reverse pushing seat 82 is fixed on the two rails 3 but can freely slide along the rails 3. The other side of the reverse pushing seat 82 is connected with one end of a hydraulic cylinder 83, the other end of the hydraulic cylinder 83 is a lifting rod, the lifting rod is used for directly lifting and pushing a large-tonnage object, and the stretching direction of the lifting rod is the horizontal direction, as shown in fig. 5.

The thrust grooves 4 at the bottom of the groove 2 can be arranged at equal intervals or unequal intervals, but the interval between two adjacent thrust grooves 4 is not more than the maximum jacking stroke of the hydraulic device. The thrust grooves 12 are preferably arranged at equal intervals, the interval between two adjacent thrust grooves 4 is preferably consistent with the maximum jacking stroke of the hydraulic device 2, and the connecting lines of the thrust grooves 12 corresponding to different groups of pushing channels are parallel to each other. The thrust groove 4 can be directly formed by the foundation 1, that is, the thrust groove 4 is formed by reinforced concrete, but considering that the stress of the thrust groove 4 is large, it is more preferable that the bottom of the groove 2 is embedded with the counter plate 41 and the inclined plate 42 at equal intervals, the inclination directions of the counter plate 41 and the inclined plate 42 are opposite, the acute angle formed by the counter plate 41 and the horizontal plane is larger than the acute angle formed by the inclined plate 42 and the horizontal plane, and the thrust groove 4 is formed by the counter plate 41 and the inclined plate 42, as shown in fig. 5. The counter plate 41 and the inclined plate 42 are each preferably a steel plate, for example, a steel plate having a thickness of not less than 20 mm. The counter plate 41 and the inclined plate 42 of the same thrust groove 4 may be an integral, welded connection or separate structures without direct contact. The counter plate 41 directly supports the counter rod 81, the stress of the counter plate 41 is large, in order to further improve the structural strength of the counter plate 41, an auxiliary supporting steel plate 43 is further arranged on one side, back to the inclined plate 42, of the counter plate 41, and the auxiliary supporting steel plate 43 is used for dispersing the stress of the counter plate 41. The auxiliary support steel plate 43 is horizontally arranged or perpendicular to the counter plate 41 or is between perpendicular to horizontal with the counter plate 41.

When the hydraulic device starts to push, the counter-thrust rod 81 can be directly clamped or dropped into the thrust groove 4 and provides a counter-acting force, that is, the thrust groove 4 always provides a counter-acting force for the hydraulic device 2. Or, one end of the groove 2 is a pushing starting end, the foundation 1 is further fixedly provided with a fixed seat 5 at the pushing starting end of the groove 2, and the fixed seat 5 is preferably a steel member and is embedded in the foundation. The fixed seat 5 is used for providing a reaction force for the initial pushing of the hydraulic device, and the thrust groove 4 provides a reaction force when the hydraulic device pushes again.

Claims

1. Track structure is passed to large-tonnage object level, include basis (1) and set up in at least two sets of channels of advancing of basis (1) upper surface, basis (1) is reinforced concrete structure, and each group's channel of advancing is parallel to each other, its characterized in that: the structure of the pushing channel is as follows: the top of basis (1) sets up recess (2), and the both sides of recess (2) are fixed respectively and are set up two tracks (3), and the installation face level of two tracks (3), two tracks (3) are parallel to each other and about the central line axis symmetry of recess (2), and the bottom interval arrangement of recess (2) is ratchet-toothed thrust groove (4) at vertical cross-section.

2. The large-tonnage object horizontal pushing track structure as set forth in claim 1, characterized in that: the bottom of the groove (2) is embedded with a counter plate (41) and an inclined plate (42) at equal intervals, the inclination directions of the counter plate (41) and the inclined plate (42) are opposite, the acute angle formed by the counter plate (41) and the horizontal plane is larger than the acute angle formed by the inclined plate (42) and the horizontal plane, and the counter plate (41) and the inclined plate (42) form a thrust groove (4).

3. The large-tonnage object horizontal pushing track structure as set forth in claim 2, characterized in that: the counter-push plate (41) and the inclined plate (42) are both steel plates, one side of the counter-push plate (41) back to the inclined plate (42) is also provided with an auxiliary supporting steel plate (43),

the auxiliary supporting steel plate (43) is horizontally arranged, is vertical to the counter plate (41), or is between the vertical and horizontal positions of the counter plate (41).

4. The large-tonnage object horizontal pushing track structure as set forth in claim 1, characterized in that: one end of the groove (2) is a pushing starting end, and the foundation (1) is also fixedly provided with a fixed seat (5) at the pushing starting end of the groove (2).

5. The large-tonnage object horizontal pushing track structure as set forth in claim 1, characterized in that: the angle steel is embedded in the foundation (1) on the two sides of the groove (2) respectively, the angle steel (6) on the two sides of the groove (2) is arranged in a Gamma type, the vertical surface of the angle steel (6) forms the side wall of the groove (2), the top of the rail (3) fixed on the horizontal plane of the angle steel (6) or the top of the horizontal plane of the angle steel (6) is provided with a leveling layer (7), and the rail (3) is placed on the leveling layer (7).

6. The large-tonnage object horizontal pushing track structure as set forth in any one of claims 1 to 5, wherein: the pushing channels are four groups, and the distance between any two adjacent pushing channels is equal.

7. The large-tonnage object horizontal pushing track structure as set forth in any one of claims 1 to 5, wherein: the track (3) is a QU120 heavy steel rail, the top surface of the track (3) is planed by 5mm and ground to the degree of finish not less than 3.2, and the degree of finish of the outer side surfaces of the upper flanges of the two steel rails of the pushing channel is not less than 12.5; the levelness of the upper surface of the track (3) is less than L/1000, L is the length of the track (3), and the allowable deviation of the height difference at the joint of the sections of the track (3) is less than 1 mm.

8. The large-tonnage object horizontal pushing track structure as set forth in any one of claims 1 to 5, wherein: the track (3) is fixed on the foundation (1) through a plurality of pressing plates arranged at intervals.

9. The large-tonnage object horizontal pushing track structure as set forth in claim 8, wherein: connecting pieces are embedded in the foundations (1) on two sides of the groove (2), and the pressing plates are fixed on the connecting pieces through bolts.

10. The large-tonnage object horizontal pushing track structure as set forth in claim 9, wherein: the upper part of the connecting piece is provided with a steel base plate, the track (3) is placed on the steel base plate, and the space below the top surface of the steel base plate is filled with grouting material.